RHS 40x25x0.9 Acindar · Weight & Dimensions

Acindar, cold-formed sections · Rectangular Hollow Section

Rectangular Hollow Sections (RHS) are tubular profiles with excellent torsional resistance and aesthetic appeal. Used for columns, trusses, and exposed structural elements.

Also known as: PTR 40x25 cal 18 (México) · Caño estructural 40x25 (Argentina)

The RHS 40x25x0.9 steel profile weighs 0.9 kg/m (0.59 lb/ft), has a depth of 40 mm (1.57 in), flange width 25 mm (0.98 in). Cross-sectional area: 111.674 mm². Moment of inertia Ix = 2.474 cm⁴, Iy = 1.202 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 0.9 mm ≈ 18 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	40 mm	1.57 in
Width (b)	25 mm	0.98 in
Thickness (t)	0.9 mm	0.04 in
Fillet radius (r)	1.8 mm	0.07 in
Weight	0.9 kg/m	0.59 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	111.67 mm²	0.173 in²
Moment of inertia (Ix)	2.47 cm⁴	0.06 in⁴
Moment of inertia (Iy)	1.2 cm⁴	0.03 in⁴
Elastic section modulus (Sx)	1.24 cm³	0.075 in³
Elastic section modulus (Sy)	0.96 cm³	0.059 in³
Plastic section modulus (Zx)	1.5 cm³	0.091 in³
Plastic section modulus (Zy)	1.08 cm³	0.066 in³
Radius of gyration (rx)	1.49 cm	0.586 in
Radius of gyration (ry)	1.04 cm	0.408 in